Electrical burglar-alarm



(No Mode1.) V i f `C. A.. E. RUEBBL.

ELECTRICAL BURGLAR ALARM. No. 267,987. PatenLed Nov. 21, 1882.

UNITED STATES PATENT OEErcE.

CHARLES A. E. RUEBEL, OF OHILLICOTHE, OHIO.

ELECTRICAL BURGLAR-ALARIVI.

SPECIFICATION forming part of Letters Patent No. 267,987, dated November 21, 1882.

Application filed September 19, 1882. (No model.)

To all whom tt may concern: i

Be itknown that I, CHARLEs VA.E.I1tUEnEL, an alien and a native of Germany, residing at Chillicothe, in the county of Ross and State of Ohio, have invented certain new and useful Improvements in `Electric Burglar-Alarms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or igures of reference marked thereon, which form a part of this specification.

This invention relates to certain new and useful improvements in burglar-alarms, and it belongs to that class inwhich a spring-motor is employed to sound the alarm, which springmotor is released by a movement of the armature when the current of electricity is broken and it consists in the combination and construction of the parts, as will be hereinafter set forth, and pointed out in the claim.

In the annexed drawings, Figure l is aside view, showing the circuit-breaker connected with the window. Fig. 2 is a view showing the arrangement of the magnet, armature, and

spring-motor for sounding the alarm. Figs. 3 andlare detached views of the circuit-breaker; and Fig. 5 is a detail view, showing the construction and relative positions of the armature and bell-hammer.

In the annexed drawings, A represents the circuit-breaker, the normal position of which, when attached to a closed window or the door 0f a safe or other object, is closed so as to com plete the circuit. This circuit-breaker consists oftwo plates of non-conductingmatcrialleather orrubber answering well-which plates let into the upper plate.

breaker,when the apparatus is in use, is placed in the jamb of the window or door or between the movable portions of any obj ect to be guarded, so that the points of the circuitbreaker will be in contact and a closed circuit will result. One of the wires attached to the hereinbefore-described circuit-breaker leadsto one pole of the battery and the other one is attached to the binding-post c on the outer side of the receptacle which incluses the electromagnet and the alarm mechanism. The wire from the other pole of the battery is connected vto the binding-post d, located Yadjacent to the post c. nected to the electro-magnets B B by the terminal wires of their coils. Itis evident that by this arrangement a current is alwayspassing from the battery to the magnet. It is also evident to those skilled in the arrangement of electrical instruments that ground-wires may lbe used, and,indeed, it is preferable where the alarm-instrument is located at a considerable distance from the object to be protected.

The alarm mechanism and the means for releasing the same are inclosed within a suitable box,whichis provided with an openingthrough which passes a stem for winding up the alarm mechanism, and openings through which the hammer for sounding the bell passes.. The box is also provided with means for attaching the same to a wall, and it is preferably composed of non-conducting material. Attached to one of the perpendicular sides of the box is one or more electro-magnets, B B, having an armature, C, which is pivoted within a bracket attached to the box, so as to move to and from the cores of the magnets. This armature Gis provided at its end with a binding-post, D, or its equivalent, through which passes the rod c, which has attached at one end a spring, f, which has sufficient strength to draw the armature away from the magnet and overcome any residual magnetism which may remain in the cores after the circuit is broken. The armature G moves between guides F, which project pver the same. This armature G is provided at its free end `with a catch, E, which is attached to the same by means of the lower end of the post D, which passes through the parts and unites them to each other. This These binding-posts c and d are con- IOO ' casing for the purpose ofwindi'ng thesame.

The actuating mechanism is provided with an escapement-Wheel, z', above which is located a shaft carrying a detent, k, and a lever, H, to which is attached the bell-hammer. The lever H, as shown in Fig. 5, is arranged so that the catch of the armature C Will strike against the same and prevent it vibrating or sounding an alarm when the circuit is closed. The end of the lever H passes through the casing and Strikes upon a bell or gong, as shown.

The operation of this invention from the foregoing description may be readily understood; and among its advantages over similar apparatus, aside from its construction, may be stated that it is arranged so as to operate upon a closed circuit, and any break in the circuit caused either by the door, Window, &c.,

being opened, or cutting Wires immediately sounds an alarm which will continue until the Window is closed or the alarm mechanism runs down.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, isv In a burglar-alarm which is adapted to operate in a closed circuit so as to sound an alarm When the circuit is broken, the combination of the electro-magnets B B, armature C, guiderod F, catch E, attached to the end of the armature by the post D, With retracting-spring f, the spring-motor With vibrating bell-sounding lever H, bent so as to engage with the catch E, the parts being arranged and organized substantially as described, and for the purpose set forth. l

In testimony whereof I ax my signature in presence of two witnesses.

CHARLES A. E. RUEBEL.

Witnesses:

J AMES B. MABURY, WILLIAM BRIGGS. 

